A kind of Sāmācārī (rules of conduct qua etiquette, formality and convention);
a conventional conduct in which usage of 'if you wish' is made for carrying out a work in proper way by oneself or by others, e.g., 'if you don't mind, let me do your work' or 'if you don't mind, please do such and such work of mine'.
...icchākāro ya sāraṇe.
icchā- svakīyo´bhiprāyastayā karaṇaṃ- tatkāryanirvarttanamicchākāraḥ, sāraṇe ityaucityata ātmanaḥ parasya vā kṛtyaṃ prati pravarttane, tatrātmasāreṇe yathecchākāreṇa yuṣmaccikirṣitaṃ kāryamidamahaṃ karomīti,...anyasāraṇe ca mama pātralepanādisūtradānādi vā icchākāreṇa kuruteti.
(U 26.6 ŚāVṛ Pa 535)